641742792 has 64 divisors (see below), whose sum is σ = 1702555200. Its totient is φ = 200878080.

The previous prime is 641742779. The next prime is 641742799. The reversal of 641742792 is 297247146.

It is a super-2 number, since 2×641742792² = 823667622167910528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641742799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211059 + ... + 214077.

It is an arithmetic number, because the mean of its divisors is an integer number (26602425).

Almost surely, 2^641742792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641742792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851277600).

641742792 is an abundant number, since it is smaller than the sum of its proper divisors (1060812408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641742792 is a wasteful number, since it uses less digits than its factorization.

641742792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566 (or 3562 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 641742792 is about 25332.6428151506. The cubic root of 641742792 is about 862.5554027843. Note that the first 3 decimals are identical.

It can be divided in two parts, 64174 and 2792, that added together give a palindrome (66966).

The spelling of 641742792 in words is "six hundred forty-one million, seven hundred forty-two thousand, seven hundred ninety-two".